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ptc-50710351-Visitor
1-Visitor
April 22, 2013
Solved

MathCAD Math is wrong?

  • April 22, 2013
  • 1 reply
  • 4160 views

So I'm trying to do some simple math and it's not agreeing with my calculations. I'm doing some simple multiplication and division and it's giving me a negative result. I'm wondering if the unit conversions aren't quite right? I'm attaching the file so if anyone can offer some input, I would appreciate it. I have two equations side by side that show what MathCAD is giving me and what the simple multiplication and division SHOULD give me.

Best answer by ValeryOchkov

or so

RF.png

1 reply

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
April 22, 2013

FR.png

E
ELSID1-Visitor
1-Visitor
April 29, 2013

Valery,

The 10degree delta F that you crossed out is technically correct too! I revamp my constants (e.g. Cp) such thath the units are NOT degrees F but Delta degrees F. Works like a charm and my cohorts usually don't even "see" the delta during the reviews. It keeps things consistent for those of us in the US... goofy as it might be

V
24-Ruby IV
ValeryOchkov24-Ruby IV
24-Ruby IV
April 30, 2013

ELSID wrote:

Valery,

The 10degree delta F that you crossed out is technically correct too!

I use a lot of english reference book on power engineering but I never seen delta F degree for temperature.

Only in Mathcad

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